Center clip



June 10, 1930. J. LITTLE CENTER CLIP Filed Nov. 17; 1927 2 Sheets-Sheetl June 10, 1930. LlTTLE 1,762,302

CENTER CLIP Filed Nov. 1'7, 192'? 2 Sheets-Sheet 2 Z 5 (707; ZifllaPatented June 10, 1930 UNITED STATES PATENT? O FFICE JOHN LITTLE, OFPLAINFIELD, NEW JERSEY, ASSIGNOB T WOOD NEWSPAPER m- GHINEBYCORPORATION, OF NEW YORK, N. Y., A. CORPORATION 03' VIRGINIA.

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Application filed November 17, 1927. Serial No. 233,838.

This invention relates to a center clip for holding the plates onaprinting 0 linder at a point between two plates longitu inally locatedon the cylinder.

'The rincipal object of the invention is to avoid the necessity for avery largehole ordinarily required when the clip is made removable as isnecessary in this articular Elace; also to provide a clip ma e in twoalves, held in place by means located in one of them and projecting intothe other and capable of being separated to enable each half to beremoved separately, all co-operating to reduce the hole or openingordinarily found under the plate at this point, and thus avoiding alarge area of plate unsupported at the rear.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had 'to the accompanying drawings in which Fig. 1 isa plan of an intermediate clip formed in two parts according to thisinvention and sho g)the two parts separated and ready for assem ling orremoval; I

Fig. 2 is a similar view showing the two parts of the clip assembled andfixed in position;

Fig. 3 is a sectional view on the line 3-3 of so Fig.2, showing indotted lines, the plates in position;

Fig. 4 is-a sectional view on the line H of Fig. 2;

Fig. 5 is a view similar to Fig. 1, showing a modification 4I ofenabling the pressman to apply single plates of two-page width for oublepage spreads. This necessitates the rovision of a hole of a large sizecut out o the cyhnder, thus removing aconsiderable portion of thesupport under one of the prmtmg plates.

This hole is considerably lar er than the width of the groove in whichtfie clips slide, and as the plate is unsup orted under this area it isconsidered a rawback to good printing. as

The main object of this invention is to avoid this hole, leaving onlythe groove in which the clip is sup orted. For this purpose, referringto the st four figures, it will e seen that the plate cylinder 10 isprovided with a groove 11 extendin longitudinally for receivin theintermediate clip. This groove is un ercut on the sides 12 below.According to this invention it does not have to be enlarged to provideany hole by which the clips are removed.

The way I have shown in these four es for securing this result is toform the chp in two halves 13, these halves being rights and lefts, andeach of them having a ledgeld projecting into the undercut oove 12 onone side. The two clips exten clear across the groove as shown 1n thedrawings; and engage each other at the center. Each one is provided witha dove-tail 15 extending at 75 right angles to the groove 11, andprojecting from the center line outwardly.

In assemblin the parts for the plates, these clips are move along untilthese two dovetails register, as shown in, Fig. 2, and then two screws16 are inserted. Each screw has a screw-hole in one iece and each onehas a head which projects eyond its ownhalf into a recess 17 in theother half. In this way the heads of these screws secure accurateregister 85 and revent the two halves from moving longitu 'nally eitherto the point of separation or to the point of getting out of actualregistration. The dove-tail 15 accurately holds the plate on each side,as indicated in dotted lines in Fig. 3, and the parts are held firmly inposition by the screws 16.

To remove the clips, the two screws 16 are taken out, or at leastunscrewed so that the heads come out of the recesses 17, and then one ofthe parts can be slid along so that they are in the relative positionsindicated in Fig. 1. N ow both parts can be removed and replaced atwill.

The same princ1ple can be carried out in other forms, as for example,inthe form shown in Figs. 5, 6, 7 and 8. This construction is'similar tothe one shown in the first four figures, except that the top'of the clipis in one piece and it is only at the bottom that the divisional piece20 is provided. This latter piece has a projecting portion 21 thatextends into the undercut portion of the groove and holds this side ofthe clip in position. This member 20 also has a projecting horizontaltongue 22 at the bottom, and a tongue 23 at the top projecting intorecesses or grooves in the main portion of the clip. The two parts areheld together by a single screw 26 which passes through the top of theclip into the tongue 22 and holds the parts firmly together. When thisscrew is removed, the-two parts, of course, are separated and the lowerone can be pushed out at the 20 bottom as indicated in Fig. 5. Thenthere is no projecting member on the top part of the clip to prevent itsbeing raised out of the groove in the plate.

' It will be seen, therefore that no hole or opening is required exceptthe groove in which the clip is located. This ove has to be employedanyway. The chps'are removed readily and are solidly located in positionafter adjustment and the fastening up 30 of the screws. There is nomaterial area of the printing plate that is unbacked. Therefore the prnting-is uniform over its entire surface. H

Although I have illustrated and described only two forms of theinvention I am aware of the fact that other modifications can be madetherein by any person skilled in the art without departing from thescope of the invention as. expressed in the claims.

40 Therefore I do not wish to be limited to the exact form shown, butwhat I do claim 1. An intermediate plate clip for a printing cylinderconsisting of a plurality of parts, each having mea'nsffor holding it inan undercut groove when the parts are assembled, said parts beingseparately movable to release the parts from each other.

2. An intermediate plate clip consisting of two relatively slidableparts adapted to be held in a groove in a printing cylinder, wherebyeither one can be moved longitudinally away from the other to releasethem both.

3. An intermediate plate clip consisting of two parts, each havin anouter projection at the lower edge for tting in two undercut grooves, adove-tail on eacho said parts for holding the ends of the two adjacentplates, and means for securing the two parts I69. together ina grooveinthe printing cylinder.

4. As an article of manufacture, an intermediate plate clip consistingof two partS,'

the two parts together being ada ted to fill a groove in a printingplate cylin er, a screw 05 located in one part and engaging the otheropgosite to hold the two parts together, and means on each part forholding that part'in radial position in the groove when they are securedtogether, said parts being slidable longitudinally in the groove pasteach other when the screw is removed.

5. As an articleof manufacture, anintermediate plate clip for a rintingcylindercomprising two parts, eac part having a main body rovided withan outer ro ection at the bottom and a dove-tail cated transversely atthe topand extendin outwardly from the center thereof, where iu the twoparts are adapted to come together at the center to forma complete clip,a screw threaded in each part and having a head projecting over into theother part across the center each part having anarcuate recess for receithe head on the screwof the other part to prevent longitudinalseparation when the screws are in position.

6. The combination with a printing cylinder having a groove extendinglongitudinally and provided with undercut recesses at its oppositesides, of a plate clip having a dovetail ontop for engaging the bevelededges of two adjacent plates on the cylinder, said plate clip consistingof two parts, each part having an outwardly extending projectionenteringthe undercut groove, and a screw for holding the two partstogether firmly, whereby when the screw is removed the two parts can beseparated in the groove'longitudinally.

7. An intermediate 'plate clip for a printing cylinder consisting of aplurality of parts,

each having means for holding it in an under- 7 cut groove when theparts are assembled, said parts being separately movable with respect toeach other to release the parts from each other in a direction alon thegroove.

In testimony whereof have hereunto affixed my signature. I

JOHN LITTLE.

